diff options
Diffstat (limited to 'bsp/include/sifive/smp.h')
-rw-r--r-- | bsp/include/sifive/smp.h | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/bsp/include/sifive/smp.h b/bsp/include/sifive/smp.h deleted file mode 100644 index 8e34388..0000000 --- a/bsp/include/sifive/smp.h +++ /dev/null @@ -1,65 +0,0 @@ -#ifndef SIFIVE_SMP -#define SIFIVE_SMP - -// The maximum number of HARTs this code supports -#ifndef MAX_HARTS -#define MAX_HARTS 32 -#endif -#define CLINT_END_HART_IPI CLINT_CTRL_ADDR + (MAX_HARTS*4) - -// The hart that non-SMP tests should run on -#ifndef NONSMP_HART -#define NONSMP_HART 0 -#endif - -/* If your test cannot handle multiple-threads, use this: - * smp_disable(reg1) - */ -#define smp_disable(reg1, reg2) \ - csrr reg1, mhartid ;\ - li reg2, NONSMP_HART ;\ - beq reg1, reg2, hart0_entry ;\ -42: ;\ - wfi ;\ - j 42b ;\ -hart0_entry: - -/* If your test needs to temporarily block multiple-threads, do this: - * smp_pause(reg1, reg2) - * ... single-threaded work ... - * smp_resume(reg1, reg2) - * ... multi-threaded work ... - */ - -#define smp_pause(reg1, reg2) \ - li reg2, 0x8 ;\ - csrw mie, reg2 ;\ - csrr reg2, mhartid ;\ - bnez reg2, 42f - -#define smp_resume(reg1, reg2) \ - li reg1, CLINT_CTRL_ADDR ;\ -41: ;\ - li reg2, 1 ;\ - sw reg2, 0(reg1) ;\ - addi reg1, reg1, 4 ;\ - li reg2, CLINT_END_HART_IPI ;\ - blt reg1, reg2, 41b ;\ -42: ;\ - wfi ;\ - csrr reg2, mip ;\ - andi reg2, reg2, 0x8 ;\ - beqz reg2, 42b ;\ - li reg1, CLINT_CTRL_ADDR ;\ - csrr reg2, mhartid ;\ - slli reg2, reg2, 2 ;\ - add reg2, reg2, reg1 ;\ - sw zero, 0(reg2) ;\ -41: ;\ - lw reg2, 0(reg1) ;\ - bnez reg2, 41b ;\ - addi reg1, reg1, 4 ;\ - li reg2, CLINT_END_HART_IPI ;\ - blt reg1, reg2, 41b - -#endif |